066f2-KaishoVtLst had a different Nelson radical than 066f2.svg
Two or three strokes in kanji files were missing kvg:type information
completely.
Two or so attributes were mis-ordered
This file seems to be just a list of the CJK stroke types from
Unicode. Further, it includes various simplified Chinese strokes which
don't occur in KanjiVG, so presumably it was never checked against the
data.
Also remove a lot of small groups containing only one path which
seemed to have caused the creator of this file much confusion.
Also put the Nelson radical on the correct stroke
This uses a script to remove all of the duplicate radicals. I spot
checked the geometry, and it seems that the first group is always the
right one to keep, because of the stroke order, so I just removed all
the other radical values on groups except the first one. I did not
actually go to the trouble of sorting the geometries in order since
there didn't seem to be any exceptions to the "first is upper left"
rule.
Change radical variant to ⻞ where appropriate
Otherwise change the radicals to the correct variant or otherwise fix
grouping errors related to radicals and their expected stroke count.
The position value indicates where the element lies with respect to
other elements, but these elements have "position" set where the
element is the outermost one which represents the entire set of
strokes, in other words there is no other element to be relative to,
so the position seems to be useless.
The vertical line was set to be a subgroup of 三 in two of these, and
in the other one the 三 group was split into two parts but the parts
were adjacent.
There is a very complex and not very useful-looking nest of subgroups
which I think could just be completely removed from all of these
cases, but I'm not tackling that in this change, I've just put the
nest of subgroups under a new group with a single child.
Ben Bullock